Bump mtnuc to 0.6

[apeltzer]

Lets get this build over night ;-)

PR checklist

• This comment contains a description of changes (with reason)
• If you've fixed a bug or added code that should be tested, add tests!
• If necessary, also make a PR on the nf-core/eager branch on the nf-core/test-datasets repo
• Ensure the test suite passes (nextflow run . -profile test,docker).
• Make sure your code lints (nf-core lint .).
• Usage Documentation in docs/usage.md is updated
• Output Documentation in docs/output.md is updated
• CHANGELOG.md is updated
• README.md is updated

[jfy133]

 fellows@datpx11799:~$ mtnucratio 
Error: Unable to access jarfile /home/fellows/miniconda3/share/mtnucratio-0.6-0/MTNucRatioCalculator-0.5.jar

bioconda-bot lied to you